A rectangular auditorium seats 1564 people. The number of seats in each row exceeds the number of rows by 12. Find the number of seats in each row.

Basically, it is (R being rows) (S being seats)

R times the amount of rows plus 12 is the amount of seats in each row

RAmnt + 12

You know there are 1564 seats

You don't know the amount of rows

You know the amount of seats in the row minus 12 is the amount of rows in all

seat per row - 12 = rows

To make it easier start making up the number of rows that are possible

Just do x - 12x over and over with the different numbers

X = 1564/y

For example

If y is 5

312.8 - 12y which would be 252.8